1、【题目】To study a foreign language, __________.

选项：

A.agooddictionaryshouldbebought

B.buyingagooddictionaryisnecessary

C.youshouldbuyagooddictionary

D.itisnecessarythatyouwillbuyagooddictionary

答案：

D

解析：

暂无解析

1、【题目】________somanypeopleintheUnitedStatesbeenoutofworkastoday.

选项：

A.Morethaneverbefore

B.Inthepast,therehavenever

C.Neverbeforehave

D.Formerly,thereneverwere

答案：

解析：

1、【题目】After so many days without rain, the ground quickly ________ the little rain that fell last night.

选项：

A.dropped

B.flooded

C.grasped

D.absorbed

答案：

D

解析：

暂无解析

1、【题目】Theproblem________whenthestudentsrefusedtodotheirhomework.

选项：

A.arose

B.aroused

C.rose

D.raised

答案：

解析：

1、【题目】Humanbehaviorismostlyaproductoflearning________thebehaviorofanimalsdependsmainlyoninstinct.

选项：

A.so

B.unless

C.if

D.while

答案：

解析：